Hunter G Series Manual - Installation & Maintenance Manual for Hunter G800 and G900 Series Sprinklers (G870, G875, G880, G885, G990 & G995)

TTS Golf RoToR oWNERS MANUAlInstallatIon, operatIon & servIcIng technIques for g835, g870, g875, g880, g990 & g995 rotors

Table of conTenTsIntroductIon .......................................................................................................................................................................................1ModelIng nuMberIng systeM ........................................................................................................................................................2InstallatIon and operatIon ..........................................................................................................................................................3

pipe connections all Models ......................................................................................................................................................3 solenoid connections electric VIH Models ...............................................................................................................................4 on-auto-off selection electric VIH Models ...............................................................................................................................5 control tubing connections c.o.M Models converted to Hydraulic configuration ...........................................................6

rIser serVIcIng and adjustMents ................................................................................................................................................7 upper snap-ring removal g800 series ......................................................................................................................................7 upper snap-ring removal g900 series ......................................................................................................................................8 riser removal all Models ............................................................................................................................................................9 arc adjustment preparation g35, g75 & g95 part-circle risers ..............................................................................................9 arc adjustment procedure g35, g75 & g95 adjustable part-circle risers ...........................................................................10nozzle replacement g70 risers ...............................................................................................................................................11 nozzle replacement g35 & g75 risers ....................................................................................................................................12 nozzle replacement g80 risers ...............................................................................................................................................13 nozzle replacement g90 risers ...............................................................................................................................................14 nozzle replacement g95 risers ...............................................................................................................................................15riser seal replacement g35, g70 & g75 risers ......................................................................................................................16 riser seal replacement g80 risers...........................................................................................................................................17 riser seal replacement g90 & g95 risers ...............................................................................................................................19 riser Filter screen servicing all tts rotors .............................................................................................................................20stator adjustments Why and when are they needed? ............................................................................................................21stator adjustments g35, g75, & g95 adjustable part-circle risers ......................................................................................21stator adjustments g80 risers ..................................................................................................................................................22 stator adjustments g90 & g95 risers ......................................................................................................................................23 riser replacement Full-circle risers.........................................................................................................................................24 riser replacement g35, g75 & g95 adjustable part-circle risers ........................................................................................24 upper snap-ring Installation tips ................................................................................................................................................24 upper snap-ring Installation g800 series ................................................................................................................................24 upper snap-ring Installation g900 series ................................................................................................................................25

Inlet ValVe reMoVal, serVIce and InstallatIon ....................................................................................................................26 Valve Identification ........................................................................................................................................................................26 Inlet Valve removal disengaging the safety Interlock Feature ..............................................................................................27 Inlet Valve removal g800 series ...............................................................................................................................................28 Inlet Valve removal g900 series ...............................................................................................................................................30Inlet Valve servicing all Models ................................................................................................................................................32 Inlet Valve Installation safety Warnings ....................................................................................................................................33 Inlet Valve Installation g800 series ...........................................................................................................................................33 Inlet Valve Installation g900 series ...........................................................................................................................................38

solenoId, pIlot ValVe & regulator serVIcIng - all electrIc VIH Models ...................................................................41 access to Flange compartment components ...........................................................................................................................41 solenoid & pilot Valve assembly removal ..................................................................................................................................43 solenoid & servicing and replacement ......................................................................................................................................44 pilot Valve replacement ...............................................................................................................................................................47 connecting solenoid to the pilot Valve.......................................................................................................................................48 attaching the assembled solenoid and pilot Valve to the Flange compartment .................................................................49 attaching selector cap to the solenoid .....................................................................................................................................50 pressure regulator purpose, settings and adjustment procedures .........................................................................................51 pressure regulator adjustment ...................................................................................................................................................52 pressure regulator replacement .................................................................................................................................................53 attaching the Flange compartment lid .....................................................................................................................................53

Thank you for purchasing hunTers TTs golf & large Turf roTors. tts rotors include all the features and quality you expect from rotors in this category with the added unique benefit of total top serviceability. With Hunters tts rotors, every serviceable component within the rotor can be accessed from the top without digging. so as ongoing routine maintenance is required, the surrounding turf remains playable, productive and pleasing to the eye.

this manual covers all aspects of installation, operation and servicing for Hunters tts rotors including models g835, g870, g875, g880, g990 and g995.

For the latest information, specifications and the location of the distributor near you, visit the Hunter golf website at www.huntergolf.com. additionally, Hunter technical services can be contacted at 800-733-2823 and choose option #3.

HunTer Golf

IntroductIon

ModEl NUMbERiNG SySTEM TTS RoToRS All ModelS

Hunter tts golf rotors are available in two basic body styles. these are the g800 series and the g900 series rotors. each of these body styles is available in either the check-o-Matic valve configuration (c.o.M.) or, the electric Valve-In-Head (e.V.I.H. or more commonly known as V.I.H.) valve configuration:

g800c = a g800 body in a c.o.M. valve configuration* g800e = a g800 body in a V.I.H valve configuration

g900c = a g900 body in a c.o.M. valve configuration* g900e = a g900 body in a V.I.H valve configuration

each body style will accept specific gear-driven risers:

g835 = g800 body style fitted with a g35 adjustable part-circle riser g870 = g800 body style fitted with a g70 full-circle riser g875 = g800 body style fitted with a g75 adjustable part-circle riser g880 = g800 body style fitted with a g80 full-circle riser

g990 = g900 body style fitted with a g90 full-circle riser g995 = g900 body style fitted with a g95 adjustable part-circle riser

combining a body style, gear-driven riser and valve configuration together creates a model number system that clearly defines the primary characteristics of the rotor:

examples -

g875c = a g800 body with a g75 adjustable riser and a c.o.M. valve g990e = a g900 body with a g90 full-circle riser and a V.I.H valve

* all c.o.M. tts rotors can be converted to the normally open Hydraulic configuration.

2

Typical NPT or BSP Swing Joint Fitting

with tapered threads

Typical ACME Swing Joint Fitting

with O-ring seal

Typical NPT or BSP Swing Joint Fitting

with tapered threads

Typical ACME Swing Joint Fitting

with O-ring seal

iNSTAllATioN ANd opERATioNPiPe ConneCTionS All ModelS

all tts rotors have a 1 inch acme threaded inlet. acme inlet threads have become the preferred thread configuration in the golf course irrigation market. do Not use npt or bsp threaded fittings to connect piping to tts rotors. acme threads are not compatible with npt or bsp fittings. acme threaded fittings and swing joints are available from your local irrigation supply company. Following are the available options for connecting tts rotors to the irrigation system piping:

PVCswingjointswitha1inchmaleAcmeoutletfitting.

Approvedflexibleswingjointswitha1inchmaleAcmeoutletfitting.

Replacethefinalfittingoftheexistingswingjointwitha1inchmaleAcmeoutletfitting(fittingmustbethesame brand as swing joint).

UsetheappropriateHunterAcmeAdapterfitting.TheseareavailablefromHunterdistributorsinvariousNPTandBSPsizes.(TeflontapeorPVCcementmustbeusedbetweentheconnectingNPTorBSPthreads)

Following are the minimum recommended swing joint sizes for tts rotors. However, follow your Irrigation consultants recommendations where applicable:

G835Seriesrotors1inchswingjointwitha1inchAcmeoutletfitting

G870Seriesrotors1inchswingjointwitha1inchmaleAcmeoutletfitting



do Not useTeflontape,PVCcementorotherthreadsealantmaterialstoconnecttheTTSrotortotheAcmefitting.Ifneeded,asmallamountofDowCorning#111ValveLubricantorpurepetroleumjellylikeVaselinecan be used around the o-ring on the acme fitting. other lubricants can deteriorate the fitting and cause leakage. thread the acme fitting into the g800 series rotor clockwise until it bottoms out (no further rotation is possible). then turn the fitting in reverse (counter-clockwise) turn. the fitting will still seal around the o-ring and this loosened position will allow minor rotation of the rotors body after installation.

typIcal npt or bsp sWIng joInt FIttIng

WItH tapered tHreads

typIcal acMe sWIng joInt FIttIng WItH

o-rIng seal

3

Solenoid ConneCTionS eleCTRiC ViH ModelS

tts electric Valve-In-Head models have solenoid lead wires protruding from the rotors body in the traditional manner. controller field wires can be connected to the rotor, using the specified watertight wiring connectors, at this sub-surface position. If specified or requested otherwise, the solenoid lead wires and controller field wires can be pulledupintotherotorsflangecompartmentwheretheinitialconnectionscanbemade(recommended).Regardlessoftheinitialconnectionpoint,futuresolenoidrepairconnectionscanbemadewithintheflangecompartment.(seesolenoid servicing later in this manual)

Caution! Whenconnectingsolenoidleadsoutsideoftheflangecompartment,DONOTpullsolenoidleadsdownward in an attempt to provide more exposed solenoid wire. electric tts rotors reQuIre slack in solenoid wiring withintheflangecompartmenttofacilitateservicingofthepilotvalveandsolenoid.Removingtheslackcanlimitmovement of the on-auto-off selector and require cutting of solenoid wires to service pilot valve and/or solenoid.

Recommended Wiring Connections

recoMMended WIrIng connectIons

do not pull on solenoId lead WIrIng

4

on-AuTo-off SeleCTion eleCTRiC ViH ModelS

electric Valve-In-Head tts rotors are equipped with a selector to control operation of the rotor. the selector is locatedontheflangecompartmentslid.Fromthefactory,theselectorissettotheAUTOpositionwhichislocatedmidway between the on and oFF positions (fig 1).

several tools are available to make on-auto-oFF selections:

T-HandleToolPN319100

HunterWrenchPN471720

Snap-ringToolPN251000

the on-auto-oFF selectors function and recommended operation is as follows:

auto the selector comes from the factory in the auto position. When in this position, the rotor will not activate unless the controller sends 24 volts of power to the rotors solenoid. (fig 1)

OFFUsingoneofthetoolslistedabove,turningtheselectorapproximatelyturnclockwisefromtheAUTOposition will manually deactivate the rotor. In the oFF position, (fig 2) the rotor will not activate even if the controller sends 24 volts of power to the rotors solenoid. to restore activation by the controllers programming, return the selector to the auto position.

ONUsingoneofthetoolslistedabove,turningtheselectorturncounter-clockwisefromtheAUTOpositionwillmanually activate the rotor. (fig 3) the rotor will continue to operate until the selector is returned to the auto or off position. de-activation of the sprinkler may take several seconds.

Caution! do not over-tighten the selector when turning to the manual oFF position. turn only until resistance is felt. over-tightening can cause premature failure of the solenoids plunger seal and lead to the rotor leaking water in the auto position.

FIg 1 FIg 2 FIg 3

5

ConTRol Tubing ConneCTionS C.o.M ModelS ConVeRTed To HydRAuliC ConfiguRATion

Inhydraulicinstallations,theflangecompartmentshouldbeusedtomaketheControlTubingconnectionstotherotor.Thisallowsfortubingconnections,pressuretestsandflushingofthecontrollines-allwithoutdigging.

ConvertingC.O.M.modelstotheHydraulicconfigurationRemovethetwostainlesssteelscrewsandlifttheflangecompartmentlidtoexposetheflangecompartment.Findtheendofthe18inchtubingthatcomesintotheflangecompartment from the bottom of the rotor (fig 4). check-o-Matic (c) versions of tts rotors can be converted for use in normally open Hydraulic systems by removing the end cap on the 18inchtubing.Todoso,slidetheinchtuberetainertowardstheendofthetube(fig5).Then,pulltoremovetheendcapwithattachedinchtuberetainerfrom the brass connector fitting (fig 6).

ToconnecttheinchcontroltubefromthecontrollertotheTTSrotortubing,insertinchtubingfromcontrollerintothebottomoftheflangecompartment.Nextslidetheinchtuberetainer(fromendcapsuppliedwithrotor)ontotheinchControlTubing.ThenconnecttheinchControlTubingtotherotors18 inch control tubing by pressingtogetheratthebrassfitting.Finally,slidetheinchtuberetainertowardsthebrassfittingtolockthe tube in place.

FIg 4 FIg 5 FIg 6

Fig 4 Fig 5 Fig 6

Fig 4 Fig 5 Fig 6

Fig 4 Fig 5 Fig 6

6

RiSER SERviciNG ANd AdjUSTMENTSCaution! the riser assembly is under spring tension. eye protection should be worn and safe-handling procedures followed when servicing this product.

tools needed (varies with riser model)

T-HandleToolPN319100

HunterWrenchPN471720

Snap-ringToolPN251000

Needle-NosePliers

FlatBladeScrewdriver

PhillipsScrewdriver

uPPeR SnAP-Ring ReMoVAl g800 SeRieS

Hold snap-ring tool vertical over the rotors upper snap ring. align the metal end of the snap-ring tool to the indicator on the snap-rings rubberized wiper seal (fig 7). use the palm of the other hand to drive the tool downward & through the rubberized membrane. tool should penetrate about inch into the snap-ring assembly (fig 8). While holding the tool within the snap-ring, press the tools handle downward and away from the center of the rotor. as the tool is pressed downward, the snap-ring will lift from the rotor (fig 9). While using the tool to hold the snap-ring in this elevated position, use the other hand to pull the snap-ring from the rotor. If the snap-rings rubberized wiper seal appears to be the only part that is lifting, the tool has not penetrated into the snap-ring far enough.

FIg 7 FIg 8 FIg 9

7

uPPeR SnAP-Ring ReMoVAl g900 SeRieS

prior to removal of the upper snap-ring assembly, the rubberized logo cap must be removed and the riser assembly must be pressed below the snap-rings rubberized seal. If the procedure below is not followed, the upper snap-ring assembly cannot be removed from the g900 series rotors:

remove the stainless screw from the center of the rubberized logo cap using a phillips screwdriver (fig 10). prior to removing the rubberized logo cap, note that the arrows on the logo indicate the position of the nozzles on the riser assembly. as the rubberized logo cap is removed, note there is a protruding pin on the underside of the logo cap (fig 11). this pin is the alignment feature on the rubberized logo cap that must be inserted correctly during assembly in order for the arrows on the rubberized logo cap to be positioned over the nozzles below. note which hole the pin fits into on top of the riser (fig 12). also note that the pin and hole locations are different for the g90 and g95 risers.

once the rubberized logo cap is removed, use the heal on the palm of your hand to forcefully press the riser assembly down (fig 13) and below the rubberized wiper seal on the snap-ring assembly (fig 14). When the rotor is dry (without water within) more force is required. If sprinkler is installed and has been activated, the water acts to lubricate the wiper making the procedure much easier.

FIg 10 FIg 11 FIg 12


FIg 16 FIg 17

Fig 16 Fig 17

Fig 16 Fig 17

Fig 10 Fig 11 Fig 12



Fig 13

Fig 14 Fig 15

Fig 13

Fig 14 Fig 15

Fig 13

Fig 14 Fig 15

8

to remove the snap-ring assembly, hold snap-ring tool vertical over the rotors upper snap-ring area. align the metal end of the snap-ring tool to the indicator on the snap-rings rubberized wiper seal (fig 15). use the palm of the other handtodrivethetooldownward&throughtherubberizedmembrane(fig16).Toolshouldpenetrateaboutinchinto the snap-ring assembly. While holding the tool within the snap-ring, press the tools handle downward and away from the center of the rotor. as the tool is pressed downward, the snap-ring will lift from the rotor. While using the tool to hold the snap-ring in this elevated position, use the other hand to pull the snap-ring from the rotor (fig 17). If the snap-rings rubberized wiper seal appears to be the only part that is lifting, the tool has not penetrated into the snap-ring far enough.

RiSeR ReMoVAl All ModelS

to remove the riser assembly, first remove the upper snap ring as outlined above. Insert the Hunter Wrench, t-Handle ToolortipoftheSnapRingtoolintotherisersliftsocket,turnturnandlifttheriserfromtherotorsbody.Theliftsocket for g870, g875 and g880 models is protected by a rubberized membrane on the rubberized logo cap and can be located by finding the raised line depiction of the sockets shape (fig 18). g990 and g995 risers have a removable rubberized logo cap so the lift up socket is accessed after removing the logo cap, directly on top of the riser (fig 19). In some cases, the riser can simply be pulled from the rotors body by hand once the upper snap-ring assembly is removed (fig 20).

ARC AdjuSTMenT PRePARATion g35, g75 & g95 PART-CiRCle RiSeRS

all Hunter adjustable arc rotors have a fixed stop on the right side of the arc and an adjustable stop on the left side of the arc. arc adjustments can be made with the riser in hand or, after installation with the rotor not activated or, while the rotor is in operation. For convenience of installation, new rotors from the factory are set to approximately 180 degrees and the long-range nozzle is positioned to the right fix side of the arc.

before setting the arc, it is necessary to first establish where the right side fixed arc stop is located:


Fig 23

Fig 24


Fig 18

Fig 19

Fig 20

Fig 18

Fig 19

Fig 20

Fig 18

Fig 19

Fig 20

Fig 22

9

With any adjustable riser held in hand to expose the rotate-able nozzle housing (also known as the turret), press down on the riser seal assembly to compress the risers retraction spring (fig 21). seal assembly must be held in this position. If riser is installed within the rotors body, the lift socket and tool can be used to expose the turret (fig 22). rotate the nozzle housing back and forth until the right side arc stop is found. this is the fixed (non-adjustable) side of the arc. all adjustments should be made with the nozzle housing in this right stop position.

With riser installed and rotor operating (fig 23) rotate the nozzle housing back and forth until the right side arc stop is found. this is the fixed (non-adjustable) side of the arc. all adjustments should be made with the nozzle housing in this right stop position.

ARC AdjuSTMenT PRoCeduRe g35, g75 & g95 AdjuSTAble PART-CiRCle RiSeRS

all adjustments are initiated by inserting the small end of the t-handle tool or the plastic end of the Hunter wrench into the risers adjustment socket. the adjustment socket can be found on the risers rubber cover by locating the circular depiction with arrows going in opposite directions (fig 24). Insert the tool through the rubberized membrane to engage the adjustment mechanism. again, all arc adjustments must be made with the turret oriented to the right fixed side of the arc as outlined in the section above.

to increase the arc of coverage insert the tool into the adjustment socket (fig 25) and make sure the nozzle housing is at the right arc stop position. each full turn of the tool to the right (clockwise) will increase the arc by 45 degrees. two full turns of the tool will result in a 90 degree increase in the arc of coverage. the arc is infinitely adjustable from 40 to 360 degrees. When maximum arc is reached, the tool will stop turning or, a ratcheting sound will be heard. to check the arc setting, rotate the turret back and forth. If further adjustments are required, repeat the steps above.

to decrease the arc of coverage insert the tool into the adjustment socket (fig 25) and make sure the nozzle housing is at the right arc stop position. each full turn of the tool to the left (counter-clockwise) will decrease the arc by 45 degrees. two full turns of the tool will result in a 90 degree decrease in the arc of coverage. the arc is infinitely adjustable from 40 to 360 degrees. When minimum arc is reached, the tool will stop turning or, a ratcheting sound will be heard. to check the arc setting, rotate the turret back and forth. If further adjustments are required, repeat the steps above.

see riser replacement section for instructions on aligning right side fixed arc stop to landscape and snap ring installation.

FIg 24 FIg 25

Fig 25 Fig 26

Fig 25 Fig 26

10

nozzle RePlACeMenT g70 RiSeRS

to view and replace the nozzles, it is necessary to:

With riser held in hand compress the riser spring by grabbing the riser seal assembly (fig 27), pressing downward and then holding riser firmly to prevent the spring from moving upwards.

Note riser assembly must be removed to changed nozzles. this is necessary since stator setting must also be adjusted when changing nozzles. see section titled, stator adjustments Why and When are they needed.

the g70 riser has two color-coded opposing nozzles. all g70 nozzles are retained in the nozzle housing (turret) with setscrews (fig 28). each setscrew has a 332 inch allen wrench recess at the top. When replacing both g70 nozzles, it is important to note that the nozzles must be the same color. these color-coded sets offer the optimum efficiency for eachflowrange.

on the g70s rubberized logo cap, locate the two opposing arrowhead shaped areas directly above the nozzles (fig 29). Insert the metal end of the Hunter wrench or a 332 inch wrench into the membrane within the arrow that is directly above the nozzle to be replaced. engage the setscrew and turn counter-clockwise until the bottom of the setscrew clears the top of the nozzle.

note the nozzles orientation prior to removal to aid in the nozzle installation process. using needle-nose pliers, grab the right side of the nozzle on its outer ring and pull outward to remove the nozzle. In some cases it may be necessary to grab the nozzles orifice to remove the nozzle. discard the old nozzle as the removal process can damage the nozzle and negatively affect the performance.

Insert the replacement nozzle into the nozzle housing with the tab positioned to the right. press firmly until it stops. turn the nozzle-retaining setscrew clockwise while making sure that the setscrew does not distort the nozzle. lower the setscrew in front of the nozzle only as far as necessary to prevent nozzle movement. take care not to position the setscrew in front of or against the nozzles orifice as performance can be negatively affected.

If the nozzle size or color has been changed, please note that the adjustable stator will likely need to be reset. refer to the stator adjustment section below for information on how to reset the stator.


Fig 27

Fig 28 Fig 29

Fig 28 Fig 29

11

nozzle RePlACeMenT g35 & g75 RiSeRS

to view and replace the nozzles, it is necessary to compress the riser spring by grabbing the riser seal assembly (fig 27 above), pressing downward and then holding riser firmly to prevent the spring from moving upwards.

the g35 nozzles are yellow with single orifices. the g75 nozzles are color-coded with two orifices. all nozzles are retained in the nozzle housing (turret) with a setscrew (fig 30). each setscrew has a 332 inch allen wrench recess at the top.

on the g35 or g75 rubberized logo cap, locate the arrowhead shaped area directly above the nozzle (fig 31). Insert the metal end of the Hunter wrench or a 332 inch wrench into the membrane within the arrow that is directly above the nozzle to be replaced. engage the setscrew and turn counter-clockwise until the bottom of the setscrew clears the top of the nozzle.

note the nozzles orientation prior to removal to aid in the nozzle installation process. using needle-nose pliers, grab the right side of the nozzle on its outer ring and pull outward to remove the nozzle. In some cases it may be necessary to grab the nozzles orifice to remove the nozzle. discard the old nozzle as the removal process can damage the nozzle and negatively affect the performance.

Insert the replacement nozzle into the nozzle housing with the smaller orifice positioned to the right. press firmly until it stops. turn the nozzle-retaining setscrew clockwise while making sure that the setscrew does not distort the nozzle. lower the setscrew in front of the nozzle only as far as necessary to prevent nozzle movement. take care not to position the setscrew in front of or against the nozzles orifice as performance can be negatively affected.

If the nozzle size or color has been changed, please note that the adjustable stator will likely need to be reset. refer to the stator adjustment section in this manual for information on how to reset the stator.

FIg 30 FIg 31

Fig 30 Fig 31

Fig 30 Fig 31

12


to view and replace the nozzles, it is necessary to compress the riser spring by grabbing the riser seal assembly (fig 32), pressing downward and then holding riser firmly to prevent the spring from moving upwards.

the g80 riser has three color-coded opposing nozzles. all g80 nozzles are retained in the nozzle housing by the shroud (fig 33) that covers the nozzle housing (turret). to remove the shroud, use a phillips head screwdriver and remove the stainless steel screw at the top of the riser by turning it counter-clockwise. prior to removal of the shroud, take note that the large nozzle arrow on top of the shrouds rubberized logo cap is orientated directly over the larger, long-range nozzle (fig 34). this will help with the shroud installation process later.

While firmly holding the compressed spring and seal assembly downward, grab and lift the shroud off the nozzle housing (fig 35). If preferred, slowly lift and release the compressed spring and seal assembly then remove them from the riser assembly. note the orientation of the seal assembly for installation later. or alternatively, continue to firmly hold the compressed spring and seal assembly downward while removing and replacing nozzles.

to remove the g80 long-range primary nozzle, use needle-nose pliers to grab the nozzles orifice then pull outward (fig 36). discard the old nozzle as the removal process can damage the nozzle and negatively affect the performance. prior to nozzle replacement, note that there is a notch (recessed area) on the nozzles outer ring. Insert the replacement nozzle into the nozzle housing with this recess positioned at the top. the correct orientation of the recessed area is important as it is part of the g80s nozzle retention system. press in firmly until the nozzle stops.

the g80s short-range and mid-range nozzles are performance matched to all g80 long-range nozzles. as a result, replacement of these nozzles is normally required only when a nozzle has been damaged. If replacement does become necessary, it is important to note that these nozzles must be installed with the correct orientation for optimal performance.

prior to removal of the short-range or mid-range nozzle, note the differences between the nozzle on the left and right. When facing the short-range and mid-range nozzles:

G80FullCircle-Theshort-rangenozzleisblackandontherightside

- the mid-range nozzle is blue and on the left side.

to remove the short or mid-range nozzle, grab and rotate the nozzle 90 degrees to the outside (away from turret) then wiggle and pull it upward. to install a short-range or mid-range nozzle, position the nozzle so the orifice is pointing outward and to the side. drop the nozzle into position by wiggling it downward. the final step is to rotate the nozzle 90 degrees pointing it in the opposite direction of the primary long-range nozzle. this action locks the nozzle in the nozzle housing.

prior to installation of the shroud, replace the retraction spring and seal assembly (if removed prior). to install the nozzle housing shroud, position the shroud over the nozzle housing. the single opening for the primary long-range nozzle in the shroud must be positioned directly over the nozzle. press into position and confirm all three nozzle openings are lined up with the nozzles inside. Install the stainless steel screw into the rubberized logo cap by turning it clockwise until hand tight. If the nozzle size or color has been changed, please note that the adjustable stator will likely need to be reset. refer to the stator adjustment section in this manual for information on how to reset the stator.

FIg 32

FIg 33 FIg 34

FIg 35

FIg 36

Fig 32

Fig 36

Fig 35

Fig 33 Fig 34

Fig 36

Fig 35

Fig 33 Fig 34

13



the g90 riser has three color-coded opposing nozzles. all g90 nozzles are retained in the nozzle housing (turret) with three setscrews (figs 38 & 39). each setscrew has a 332 inch allen recess at the top. Insert the metal end of the Hunter wrench or a 332 inch wrench into setscrew that is above the nozzle to be replaced. engage the setscrew and turn counter-clockwise until the bottom of the setscrew clears the top of the nozzle.

to remove the long-range primary nozzle, first note the nozzles orientation prior to removal. the g90s primary nozzle has a protruding rail that must engage the slot on the right side of the nozzle opening. understanding this will help during the installation process later. using needle-nose pliers, grab the nozzles outer ring next to the recess on the right side of the nozzle opening and then pull outward. If necessary, grab the nozzles orifice to gain a better grip. discard the old nozzle as the removal process can damage the nozzle and negatively affect the performance.

Insert the replacement nozzle into the nozzle housing. press firmly until the nozzle stops. turn the nozzle-retaining setscrew clockwise while making sure that the setscrew does not distort the nozzle. lower the setscrew in front of the nozzle only as far as necessary to prevent nozzle movement. take care not to position the setscrew in front of or against the nozzles orifice as performance can be negatively affected.


the g90s short-range and mid-range nozzles are performance matched to all g90 long-range nozzles. as a result, replacement of these nozzles is normally required only when a nozzle has been damaged. If replacement does become necessary, it is important to note that these nozzles must be installed in the correct orientation for optimal performance.

prior to removal of the g90s short-range or mid-range nozzle, note the differences between the nozzle on the left and right.

G90FullCircle-Theshort-rangenozzleisblackandontheleftside.(fig39)

- the mid-range nozzle is blue and on the right side. (fig 39)

Note - In late 2010, the short-range nozzle will change to red.

using needle-nose pliers, grab the nozzles orifice then pull outward. discard the old nozzle as the removal process will damage the nozzle and negatively affect the performance. Insert the replacement nozzle into the nozzle housing and press firmly until it stops. turn the nozzle-retaining setscrew clockwise to a position in front of the nozzle that prevents nozzle movement. take care not to position the setscrew in front of or against the nozzles orifice as performance can be negatively affected.


Fig 37

Fig 38 Fig 39

Fig 38 Fig 39

14



the g95 riser has three color-coded nozzles that all face the same direction. all g95 nozzles are retained in the nozzle housing (turret) with three setscrews (fig 40). each setscrew has a 332 inch allen recess at the top. Insert the metal end of the Hunter wrench or a 332 inch wrench into setscrew that is above the nozzle to be replaced. engage the setscrew and turn counter-clockwise until the bottom of the setscrew clears the top of the nozzle (fig 41).

to remove the long-range primary nozzle, first note the nozzles orientation prior to removal. the g95s primary nozzle has a protruding rail that must engage the slot on the right side of the nozzle opening. understanding this will help during the installation process later. using needle-nose pliers, grab the nozzles outer ring next to the recess on the right side of the nozzle opening and then pull outward (fig 42). If necessary, grab the nozzles orifice to gain a better grip. discard the old nozzle as the removal process can damage the nozzle and negatively affect the performance.

Insert the replacement nozzle into the nozzle housing. press firmly until the nozzle stops. turn the nozzle-retaining setscrew clockwise while making sure that the setscrew does not distort the nozzle. lower the setscrew in front of the nozzle only as far as necessary to prevent nozzle movement. take care not to position the setscrew in front of or against the nozzles orifice as performance can be negatively affected.


the g95s short-range and mid-range nozzles are performance matched to all g95 long-range nozzles. as a result, replacement of these nozzles is normally required only when a nozzle has been damaged. If replacement does become necessary, it is important to note that these nozzles must be installed in the correct orientation for optimal performance.

prior to removal of the g95s short-range or mid-range nozzle, note the differences between the nozzle on the left and right.

G95Adj.Arc-Theshort-rangenozzleisblackandontheleftside.(fig40)

- the mid-range nozzle is green and on the right side. (fig 40)

Note - In 2010, the short-range nozzle will change to red.

using needle-nose pliers, grab the nozzles orifice then pull outward. discard the old nozzle as the removal process will damage the nozzle and negatively affect the performance. Insert the replacement nozzle into the nozzle housing and press firmly until it stops. turn the nozzle-retaining setscrew clockwise to a position in front of the nozzle that prevents nozzle movement. take care not to position the setscrew in front of or against the nozzles orifice as performance can be negatively affected.




Fig 40 Fig 41 Fig 42 15

RiSeR SeAl RePlACeMenT g35, g70 & g75 RiSeRS

the g35, g70 and g75 riser seal assemblies and the compressed retraction spring are retained on the risers with the rubberized logo cap assembly. It is necessary to remove the rubberized logo cap assembly in order to replace the riser seal assembly. to remove the rubberized logo cap assembly, it is necessary to fully compress the riser spring by grabbing the riser seal assembly (fig 43), pressing downward and then holding riser firmly to prevent the spring from moving upwards.

Caution! The riser assembly is under spring tension. Eye protection should be worn and safe-handling procedures followed when servicing this product.

Hold the riser seal assembly down with one hand. using the other hand, locate the two hidden screws that retain the rubberized logo cap assembly. these can be found by pressing down on the rubberized logo cap close to the H and the r on the Hunter logo (figs 44 & 45). the phillips headed retaining screws are directly beneath these depressions. Insert the phillips screwdriver through the rubberized membrane and engage each retaining screw. turn counter-clockwise to remove each screw.

prior to removing the rubberized logo cap assembly, note its orientation as it relates to the nozzles below. this will help with the assembly process later. remove the rubberized logo cap and set aside.

While still holding the compressed riser seal assembly and retraction spring with one hand, use the other hand to grasp the bottom of the riser assembly. slowly release the compression of the retraction spring until it is fully extended and no pressure is felt.

prior to removing the riser seal assembly, note the orientation and sequence of the three individual seal assembly parts (fig 46). the upper seal support is on top and its lower surface nests perfectly with the top of the riser seal. the riser seal is the rubberized part in the middle. the lower seal support (also known as the upper spring support) has an upper surface that nests perfectly to the lower surface of the riser seal. the supports lower surface also provides a nest for the retraction spring. during assembly, these three parts must keep this sequence and orientation in order for the seal assembly to function properly.

If any one of the three parts in the seal assembly needs replacement, it is highly recommended that all three components be replaced. to re-assembly the riser, place the seal assembly on top of the retraction spring and then compress. While firmly holding the retraction spring and seal assembly down, place the logo cap assembly on top of the riser in the correct orientation. Insert the two stainless-steel screws through the rubberized membranes on the logo cap and hand tighten with a phillips screwdriver.

FIg 43 FIg 44 FIg 45 FIg 46

Fig 43

Fig 44

Fig 45

Fig 46

Fig 43

Fig 44

Fig 45

Fig 46

Fig 43

Fig 44

Fig 45

Fig 46

Fig 43

Fig 44

Fig 45

Fig 46

16

RiSeR SeAl RePlACeMenT g80 RiSeRS

the g80 riser seal-block assembly and the compressed retraction spring are retained on the riser with the shroud/logo-cap assembly. It is necessary to remove this assembly in order to service the g80s riser seal components. to remove the shroud/logo-cap assembly, it is necessary to fully compress the riser spring by grabbing the riser seal-block assembly, pressing downward and then holding riser firmly to prevent the spring from moving upwards (fig 47).


press the riser seal-block assembly down with one hand and hold firmly. locate the stainless-steel retaining screw on top of the shroud/logo-cap assembly (fig 48). use a phillips screwdriver to engage the screw and turn counter-clockwise to remove. prior to removal of the shroud, take note that the large nozzle arrow on top of the shrouds rubberized logo cap is orientated directly over the larger, long-range nozzle. this will help with the shroud installation process later.

While firmly holding the compressed spring and seal-block assembly downward, grab and lift the shroud off the nozzle housing then set it aside (fig 49). slowly lift to release the spring compression. note the orientation of the seal-block assembly for installation later (fig 50). next, remove the seal-block assembly and retraction spring.

the riser seal on g80 risers include two primary components - the seal block assembly and the face-seal. the seal block assembly sits on top of the retraction spring and has two sealing surfaces. First, the seal block has an o-ring around the outside. If the o-ring is damaged, deteriorated or missing, the riser will leak water while the sprinkler is operating. the second sealing surface on the seal-block assembly is on the underside. the angled surface on the underside of the seal-block assembly is the interface for the face-seal. If this angled interface surface is cut or otherwise damaged, the riser can leak water during sprinkler operation.

the face-seal is the second primary component to the g80s riser seal design. the face-seal is the white plastic angled ring that is position at the base of the stainless-steel portion of the g80s riser. If the face-seal is damaged, deteriorated or missing, the riser will leak during sprinkler operation.

If the riser is leaking during sprinkler operation, the o-ring, the interface and the face-seal must be inspected in order to determine the cause of the leakage. If the o-ring is damaged, it can easily be replaced by removing the damaged o-ring from the seal-block and replacing it with a new one. use care to ensure that the o-ring is not cut or twisted during the installation process. If the interface is damaged, the entire seal-block must be replaced. also, if the interface is damaged it is highly likely that the face-seal is damaged as well and needs replacement.

to replace the face-seal, slide it upwards and off the riser assembly. replacement face-seals must fit very snug to the stainless-steel on the riser. as a result, there may be considerable resistance when attempting to install the new face-seal. to make installation easier, the face-seals diameter can be expanded by placing it in the sun for several minutes. or, if the repair is being done in the shop, placing the face-seal in warm water for several minutes will cause expansion as well.

slide the new face-seal down and onto the riser. Make sure that it is pressed all the way until it is seated firmly against the ledge at the base of the stainless-steel portion of the riser. Install the retraction spring and seal-block assembly onto the g80 riser. press down on the seal-block to compress the retraction spring and hold firmly in this position.

to install the nozzle housings shroud/logo-cap assembly, position it over the nozzle housing. the single opening for the primary long-range nozzle in the shroud must be positioned directly over the long-range (largest) nozzle. press into position and confirm all three nozzle openings are lined up with the nozzles inside. Install the stainless steel screw into the rubberized logo cap by turning it clockwise until hand tight.

17

FIg 47

FIg 49 FIg 50

FIg 48

Fig 48

Fig 47

Fig 48

Fig 47

18

RiSeR SeAl RePlACeMenT g90 And g95 RiSeRS

the g90 and g95 riser seal assembly and the compressed retraction spring are retained on the riser with the retainer cap (plastic plate) at the top of the riser assembly. It is necessary to remove the retainer cap in order to replace the riser seal components. to remove the retainer cap, fully compress the riser spring by grabbing the riser seal assembly (fig 51), pressing downward and then holding riser firmly to prevent the spring from moving upwards.


Hold the riser seal assembly down with one hand. locate the two screws that hold the retainer cap to the riser assembly (fig 52). use a phillips screwdriver to engage each retaining screw and turn counter-clockwise to remove. prior to removing the g90 or g95 retainer cap, note its orientation as it relates to the nozzles below. this will help with the assembly process later. remove the retainer cap and set aside.

While still holding the compressed riser seal assembly and retraction spring with one hand, use the other hand to grasp the bottom of the riser assembly. slowly release the compression of the retraction spring until it is fully extended and no pressure is felt. note the orientation of the riser components to help with assembly later (fig 53).

the riser seal on g90 and g95 risers include two primary components - the seal block assembly and the face-seal. the seal block assembly sits on top of the retraction spring and has two sealing surfaces. First, the seal block has an o-ring around the outside. If the o-ring is damaged, deteriorated or missing, the riser will leak water while the sprinkler is operating. the second sealing surface on the seal-block assembly is on the underside. the angled surface on the underside of the seal-block assembly is the interface for the face-seal. If this angled interface surface is cut or otherwise damaged, the riser can leak water during sprinkler operation. the face-seal is the second primary component to the g90 and g95 riser seal design. the face-seal is the white plastic angled ring that is position at the base of the riser. If the face-seal is damaged, deteriorated or missing, the riser will leak during sprinkler operation.

If the riser is leaking during sprinkler operation, the o-ring, the interface and the face-seal must be inspected in order to determine the cause of the leakage. If the o-ring is damaged, it can easily be replaced by removing the damaged o-ring from the seal-block and replacing it with a new one. use care to ensure that the o-ring is not cut or twisted during the installation process. If the interface is damaged, the entire seal-block must be replaced. also, if the interface is damaged it is highly likely that the face-seal is damaged as well and needs replacement.

to replace the face-seal, slide it upwards and off the riser assembly. replacement face-seals must fit very snug to the stainless-steel on the riser. as a result, there may be considerable resistance when attempting to install the new face-seal. to make installation easier, the face-seals diameter can be expanded by placing it in the sun for several minutes. or, if the repair is being done in the shop, placing the face-seal in warm water for several minutes will cause expansion as well. slide the new face-seal down and onto the riser. Make sure that it is pressed all the way until it is seated firmly against the ledge at the base of the riser. Install the retraction spring and seal-block assembly onto the riser. press down on the seal-block to compress the retraction spring and hold firmly in this position. While firmly holding the retraction spring and seal assembly down, place the retainer cap on top of the riser in the correct orientation. Insert the two stainless-steel screws and hand-tighten with a phillips screwdriver.

FIg 51

FIg 52 FIg 53

Fig 51

Fig 52

Fig 51

Fig 52

Fig 51

Fig 52

19

RiSeR filTeR SCReen SeRViCing All TTS RoToRS

the riser filter screen is located at the base (bottom) of each riser. the purpose of the filter screen is to prevent entry ofdebristhataretoolargetoexittheriserthroughthenozzles.Ifthefilterbecomescloggedwithdebris,waterflowthrough the riser can be severely reduced and lead to diminished sprinkler performance.

to remove the filter screen, locate the notched recessed area located on the outside where it meets the bottom of theriser(fig54,55,56).Insertthesnap-ringtooloraflatbladedscrewdriverintotherecessandthentwisttoliftthefilter screen from its position against the riser. Flush filter screen with water to remove debris. to install filter screen, press firmly into position against the riser.

FIg 54 g35, g70 & g75 screen

FIg 55 g80 screen

FIg 56 g90 & g95 screen

20

STAToR AdjuSTMenTS WHy And WHen ARe THey needed?

the adjustable stator is preset at the factory to match the nozzle installed in the rotor. the purpose of the stator is to maintain a consistent and desirable speed of rotation. rotors that turn too fast cannot reach their published radius distance. rotors that turn too slow will irrigate with a higher precipitation rate per revolution causing wet spots and run-off.

Ifnozzlesarechangedtoaflowgreaterthantheoriginalfactorynozzle,thespeedofrotationwillbecomefasterunless the appropriate stator adjustments are made. this is because there is a greater amount of water passing the turbinethatdrivesthegearbox.Theoppositeistrueifasmallerflownozzleisinstalledwithoutadjustingthestator-the rotor will slow down. In extreme situations, the rotor may not rotate at all if the stator is not adjusted. again, stator adjustmentsarenotrequiredunlessthenozzleflowisbeingchangedor,thestatorwassetincorrectlyatsomepointin time.

setting the stator is as simple as matching the stator setting number to the nozzle number being used in the rotor. For example, if the nozzle in use is #20, then the stator setting will be #20. to access the stator adjustment, first remove the risers filter screen as outlined in the section above.

STAToR AdjuSTMenTS g35, g70 & g75 RiSeRS

turn the riser upside down, remove the filter screen and view the stator area. notice the black part with the three sections extending outward from the center (fig 57). this black part on g70 and g75 risers is called the adjustable stator plate. beneath the adjustable stator plate is a gray non-removable part with the three openings. this part is called the stator. the stator has a series of numbers engraved into the plastic. these numbers are the nozzle size reference numbers.

to make an adjustment, use the blade end of the snap-ring tool or a bladed screwdriver to lift the adjustable stator plate off the stator. to do so, place the tool under one of the two tabs on the post at the center of the stator (fig 58). pry the tab upward and the stator plate will snap off.

to reset and install the adjustable stator plate, notice the small cutout on each of the three sections of the adjustable stator plate. next, on the stator find the nozzle number that is being used. simply align any one of the cutouts on the adjustable stator plate with the desired nozzle number on the gray stator (fig 59). then, snap the adjustable stator plate down into position. once the stator plate is installed, check to make sure the desired nozzle number is visible in the cutout window. Finally, install the filter screen as outlined above.





21

STAToR AdjuSTMenTS g80 RiSeRS

turn the riser upside down, remove the filter screen and view the stator area. notice the black part with the three sections extending outward from the center (fig 60). this black part on g80 risers is called the adjustable stator plate. beneath the adjustable stator plate is a gray non-removable part with the three openings. this part is called the stator. the stator has a series of numbers engraved into the plastic. these numbers are the nozzle size reference numbers.

to make an adjustment, rotate the adjustable stator plate to the right in a clock-wise direction (fig 61). notice the small cutout or window on the adjustable stator plate. as the adjustable stator plate is rotated, the various nozzle reference numbers will appear in the cutout/window. simply keep rotating the adjustable stator plate until the desired nozzle number on the gray stator appears in the cutout/window. double-check to make sure the desired nozzle number is visible in the cutout/ window. Finally, install the filter screen as outlined in the filter screen servicing section above.

FIg 60 FIg 61

Fig 60 Fig 61

Fig 60 Fig 61

22

STAToR AdjuSTMenTS g90 And g95 RiSeRS

turn the riser upside down, remove the filter screen and view the stator area. notice the white plastic part that is set within the bottom of the riser (fig 62). this white part on g90 and g95 risers is called the adjustable stator plate. beneath the adjustable stator plate is a black non-removable plastic part with the opening in the center for the turbine and the single opening to the side. this part is called the stator. the outer ring at the base of the riser has recessed notches all the way around it. notice that the white adjustable stator plate has a protrusion that is engaged with one of these recessed notches. this protrusion is the adjustable stator plates pointer. also notice there is a series of numbers engraved into the plastic next to some of the recessed notches. these numbers are the nozzle size reference numbers.

to make an adjustment, first find the raised wall or blade of plastic on the adjustable stator plate. use pliers to grab the plastic blade then pull to remove the white adjustable stator plate from the riser (fig 63). to reset and install the adjustable stator plate, find the nozzle size reference number on the outer ring that matches the installed nozzle. simply align the pointer on the adjustable stator plate with the desired nozzle number on the outer ring. the pointer can be placed on either side of the nozzle reference number (fig 64). next, snap the adjustable stator plate down and into position. once the adjustable stator plate is installed, check to make sure the desired nozzle size reference number aligned with the pointer. Finally, install the filter screen as outlined above.





23

RiSeR RePlACeMenT full-CiRCle RiSeRS

Full-circle riser assemblies can be inserted into the rotors body without regard to arc orientation. Insert the riser, screen first, into the rotors body until it comes to a stop. next, install the upper snap-ring referencing instructions below for your rotor model.

RiSeR RePlACeMenT g35, g75 & g95 AdjuSTAble PART-CiRCle RiSeRS

adjustable part-circle risers must be inserted such that the arc setting aligns to the area to be irrigated. all Hunter adjustable arc rotors have a fixed stop on the right side of the arc and an adjustable stop on the left side of the arc. rotate the nozzle housing (turret) back and forth to find the right fixed stop. With the riser positioned to the right fixed arc stop, oriented and point the long-range nozzle to the right side of the landscape area to be irrigated. drop the riser into position within the rotors body.

For convenience of installation, new rotors from the factory are set to approximately 180 degrees and the long-range nozzle is positioned to the right fix side of the arc. arc adjustments can be made with the riser in hand or, after instalation dry or, while the rotor is in operation.

refer to the section earlier in this manual to learn more about the arc adjusting procedures.

uPPeR SnAP-Ring inSTAllATion TiPS

Hunter golf tts rotors have upper snap-rings with an integrated wiper to help protect the riser and riser seal from external contamination. It is important to follow these installation instructions to maximize the effectiveness of this design.

First,itisimportantalignsnap-ringssothattheopenendofthesnap-ringisnotadjacentto(nextto)theflangecompartment.Thiswillbecomeveryimportantthenexttimethesnap-ringisremoved.Iftheflangecompartmentlidhasbeenremovedandtheopenendofthesnap-ringisadjacentto(nextto)theflangecompartment,itwillbeverydifficult to remove the snap-ring using the snap-ring tool. For better leverage when removing the snap-ring, always aligntheopenendofthesnap-ringinapositionthatisoppositefromthebodysflangecompartment.

Thesecondtipforuppersnap-ringinstallationisabouttherubberizedflapsateachendofthesnap-ring.Toensurethattheserubberizedflapslieflatafterinstallation,itisimportantinstallthesnap-ringcorrectly.Onceinstalled,theflapontheleftendofthesnap-ringmustbeundertheflapontheright-sideendofthesnap-ring.

uPPeR SnAP-Ring inSTAllATion g800 SeRieS

Hold the snap-ring in front of you with the wiper seal facing up and the snap-ring open ends at the top. the snap-ring end on the left must be installed first (fig 65). lay the snap-ring on top of the rotor and use the left thumb to force the left open end of the snap-ring into the upper snap-ring groove within the body (fig 66). once engaged, the remaining portion of the snap-ring can be installed by pressing in a counter-clockwise motion around the snap-ring (fig 67).





24

uPPeR SnAP-Ring inSTAllATion g900 SeRieS

Hold the snap-ring in front of you with the wiper seal facing up and the snap-ring open ends at the top. the snap-ring end on the left must be installed first. lay the snap-ring on top of the rotor and use the left thumb to force the left open end of the snap-ring into the upper snap-ring groove within the body (fig 66). once engaged, the remaining portion of the snap-ring can be installed by pressing in a counter-clockwise motion around the snap-ring.

prior to installing the rubberized logo cap, the riser assembly must be pulled up above the upper snap-rings rubberized seal. If this procedure is not followed, the rubberized logo caps stainless steel screw cannot reach the riser assembly below and attachment will be impossible.

to pull the riser assembly above the upper snap-rings wiper seal, first locate the lift-up socket on top of the riser assembly.UsingtheT-HandleToolorSnap-ringToolorHunterWrench,insertthetoolintothelift-upsocket,turnturn(fig 67). next, lift the riser assembly up until the nozzles can been seen above the upper snap-ring assembly (fig 68). slowly release the riser assembly downward until the riser assembly rests on top of the upper snap-ring assembly (fig 69).

as the rubberized logo cap is installed, note there is a protruding pin on the underside of the rubberized logo cap (fig 70). this pin is the alignment feature on the rubberized logo cap that must be oriented and inserted into the riser assembly correctly. proper alignment and installation of the protruding pin allows the nozzle direction arrows on the rubberized logo cap to be positioned over the nozzles below. note which hole in the top of the riser that the pin fits into (fig 71). also note that the pin and hole locations are different for the g90 and g95 rotors.

Install the rubberized logo cap using a phillips screwdriver. tighten the stainless screw clockwise until the screw is hand tight. do not over-tighten.

FIg 66

FIg 69

FIg 67

FIg 70

FIg 68

FIg 71













25

iNlET vAlvE REMovAl, SERvicE ANd iNSTAllATioNCaution! Electric valve-in-head rotors are connected to pressurized main-line or sub-main piping. This pressurized piping must be depressurized before servicing the inlet valve. Serious bodily injury can occur if valve is removed when the piping is pressurized. Keep head and body parts away from the rotors exposed internal openings at all times. Wear proper eye protection and use the designated tools when servicing these rotors.

ToolS needed (VARieS WiTH RoToR Model)

once the riser assembly has been removed, the following tools are used to remove, service and replace inlet valves:

G800ValveToolPN604000

G900ValveToolPN280500

Snap-RingToolPN251000

16Needle-NosePliersToolPN475600

ManualExtractionPumpToolPN460302

TTSValveFlushingToolPN609400

VAlVe idenTifiCATion

It is important to note that there are different types of inlet valves (also commonly known as foot valves). If the incorrect inlet valve is installed, the rotor will malfunction. Hunter has a color-coding system to help correctly identify these valves:

g800c check-o-Matic rotors = black screen attached to valve (fig 72)

g800e electric V.I.H. rotors = tan screen attached to valve (fig 73)

g900c check-o-Matic rotors = black screen attached to valve (fig 74)

g900e electric V.I.H. rotors = White screen attached to valve (fig 75)

Warning:

Ifablackscreenedinletvalveisinstalledintoanelectricvalve-in-headrotor,therotorwillnotshutoff.

Ifatanorwhitescreenedinletvalveisinstalledintoacheck-o-maticrotor,therotorwillleakwaterfromthevent port during sprinkler operation and, the check height will be negatively affected.

FIg 72 FIg 73 FIg 74 FIg 75

Fig 72

Fig 73

Fig 74

Fig 75

26

inleT VAlVe ReMoVAl diSengAging THe SAfeTy inTeRloCk feATuRe

Caution! Electric valve-in-head rotors are connected to pressurized main-line or sub-main piping. This pressurized piping must be depressurized before servicing the inlet valve. Serious bodily injury can occur if valve is removed when the piping is pressurized. Keep head and body parts away from the rotors exposed internal openings at all times. Wear proper eye protection and use the designated tools when servicing these rotors.

With the main-line or sub-main depressurized and the riser assembly removed, proceed with disengaging the g800 inlet valves safety interlock feature as follows:

remove the water inside the rotors body using manual hand pump. look into the body cavity and take note of the white lower snap-ring and just below, the black top of the inlet valve (fig 76). the white snap ring may be stained from the water making it gray or brown colored (fig 77). to help prevent removal of the inlet valve with the main-line or sub-main pressurized, a safety interlock feature has been added to the white lower snap-ring. before the white lower snap-ring and inlet valve can be removed, this safety interlock feature must be disengaged.

to disengage the safety interlock feature, place the tip of the 16 needle-nose pliers tool on top of the inlet valve. next, press downward on the inlet valve. the inlet valve should move down slightly. If no movement is observed or felt, stop and confirm that the main-line or sub-main has been depressurized.

If main-line or sub-main has been shut off, it is possible that resident pressure is still within the line and this pressure is preventing the inlet valve from moving downward. to relieve this pressure, activate a near-by quick coupler or, turn the rotors selector cap to the manual on position. Warning rotor may activate for a brief period of time. use the 16 needle-nose pliers tool to press downward on the inlet valve again. the white lower snap-ring and inlet valve are now ready for removal.

FIg 76 FIg 77

Fig 76

Fig 77

Fig 76

Fig 77

27

inleT VAlVe ReMoVAl g800 SeRieS

With the main-line or sub-main depressurized, the riser assembly removed, the water extracted from the body cavity and the safety interlock feature disengaged, proceed with removal of the g800s white lower snap-ring and inlet valve as follows:

First, notice that close to each end of the white lower snap-ring there are two raised areas (fig 76). these two raised areas are used to remove the white lower snap-ring. also notice that the inlet valve has two posts protruding upward on top of the inlet valve. take a moment to note the orientation of these posts and how they nest within the white lower snap-ring. understanding this alignment and orientation will help later to confirm that the white lower snap-ring has been properly seated after installation.

to remove the white lower snap-ring, use the 16 needle-nose pliers tool to grab the outer side of the two raised areas near the ends of the white lower snap-ring. next, squeeze the two raised areas together with the tips of the 16 needle-nose pliers tool (fig 78). this action will collapse the white lower snap-ring. While holding the collapsed white lower snap-ring, pull the 16needle-nose pliers up and out along with the white lower snap-ring (fig 79).

Inlet valve removal option 1 once the white lower snap-ring has been removed, the inlet valve is released and is ready for removal. g800 series inlet valves are removed from the body using the g800 Valve tool. prior to using the tool, familiarize yourself with the individual features of the g800 Valve tool. First, notice there are two metal hooks at the bottom of the tool (fig 80). these hooks are used to grab/hook the inlet valve for removal from the rotors body. the black plastic part of the g800 Valve tool includes physical features that hold or nest the inlet valve to the tool during inlet valve removal and installation.

In order to engage the inlet valve with the g800 Valve tool properly, you must be familiar with the pointing and alignment features on the tools black plastic part. First, look at the three retaining screws on top of the tool. next, find the screw that has a pointer arrow engraved around the head of the screw (fig 81). this pointer is used to indicate the direction and alignment that the tool must have as it is inserted into the rotors body. a second pointer arrow is located directly below on the underside of the g800 Valve tool (fig 82).

to remove the inlet valve, it is necessary to align the pointer arrow on the g800 Valve tool with the alignment dot ontherotorsflange.Thealignmentdotiscenteredontheflangecompartmentlidadjacentto(nextto)thebodycavityopening(fig81).Asecondalignmentdotislocatedbelowthelidincasetheflangecompartmentlidhasbeenremoved. align the pointer arrow on the tool with the alignment dot and lower the tool into the rotors body.

as the g800 Valve tool is lowered into the rotors body, recessed areas on the black plastic part on the tool will engage vertical rails inside the body wall (fig 83). the tool must engage these rails or the tool will not align with the inlet valve below. continue pressing downward compressing the spring on the g800 Valve tool. While holding the tool down with the spring compressed, turn the tools handle clockwise until it stops. next, release the springs compression by lifting the handle slightly on the g800 Valve tool. this action hooks and locks the inlet valve to the tool. Finally, pull upward on the tools handle to remove the tool and inlet valve from the rotors body (fig 84).

FIg 78 FIg 79

Fig 78 Fig 79

Fig 78 Fig 79

28

Important take note of how the g800 Valve tool nests with the attached inlet valve. this will help later when attaching the inlet valve to the tool prior to inlet valve installation.

to disengage the inlet valve from the g800 Valve tool, hold the inlet valve with one hand and the tool with the other hand. next, push the tools handle toward the inlet valve to compress the tools spring (fig 85). With the spring held compressed, rotate the tools handle counter-clockwise to release the tools hooks from the inlet valve.

Inlet valve removal option 2 once the white lower snap-ring has been removed, the inlet valve is released and is ready for removal. First notice the raised wall or rib that protrudes upward from the center of the inlet valve (fig 86). use the 16 needle-nose pliers tool to grab this protruding rib firmly. While holding the protruding rib firmly with the 16 needle-nose pliers tool, pull upward to disengage and remove the inlet valve from the rotors body (fig 87).

FIg 80

FIg 83

FIg 86 FIg 87

FIg 81

FIg 84

FIg 82

FIg 85


Fig 83

Fig 84

Fig 85

Fig 86

Fig 87

Fig 86

Fig 87

Fig 83

Fig 84

Fig 85

Fig 83

Fig 84

Fig 85



29

inleT VAlVe ReMoVAl g900 SeRieS

With the main-line or sub-main depressurized, the riser assembly removed, the water extracted from the body cavity and the safety interlock feature disengaged, proceed with removal of the g900s white lower snap-ring and inlet valve as follows:

First, notice that close to each end of the white lower snap-ring there are eyelets (areas with a hole for access). these two eyelets are used to remove the white lower snap-ring (fig 88).

to remove the white lower snap-ring, insert the metal end of the snap-ring tool into one of the eyelets. next, twist the snap-ring tools handle while forcing the tip of the tool towards the center of the rotors body cavity (fig 89). this action will disengage one end of the white lower snap-ring from the recessed groove at the base of the rotors body. With the white lower snap-ring disengaged from the groove, pull the tool upward to remove the white lower snap-ring (fig 90).

once the white lower snap-ring has been removed, the inlet valve is released and is ready for removal. g900 series inlet valves are removed from the body using the g900 Valve tool. prior to using the tool, familiarize yourself with the individual features of the g900 Valve tool. First, notice there are hooks at the end of each metal bar (fig 91). these hooks are used to grab/hook the inlet valve for removal from the rotors body. the black plastic part of the g900 Valve tool includes physical features that hold or nest the inlet valve to the tool during inlet valve removal and installation.

In order to engage the inlet valve with the g900 Valve tool properly, you must be familiar with the pointing and alignment features on the tools black plastic part. First, look at the top inside diameter (inner circle) of the black plastic part on the tool. next, find the small pointer arrow that protrudes towards the center (fig 92). this pointer is used to indicate the direction and alignment that the tool must have as it is inserted into the rotors body.

directly below the pointer on the underside of the g900 Valve tool there are a series raised tabs. the tab directly below the pointer appears to be missing but this gap between tabs is intentional (it is designed to be this way). When the tool is nested to the valve, the gap provides clearance for the inlet valves communication port (fig 93).

FIg 88

FIg 91

FIg 89

FIg 92

FIg 90

FIg 93







30

to remove the inlet valve, it is necessary to align the pointer arrow on the g900 Valve tool with the alignment dot on therotorsflange.Thealignmentdotiscenteredontheflangecompartmentlidadjacentto(nextto)thebodycavityopening.Asecondalignmentdotislocatedbelowthelidincasetheflangecompartmentlidhasbeenremoved.align the pointer arrow on the tool with the alignment dot (fig 94) and lower the tool into the rotors body (fig 95).

as the g900 Valve tool is lowered into the rotors body, recessed areas on the black plastic part on the tool will engage vertical rails inside the body wall. the tool must engage these rails or the tool will not align with the inlet valve below. continue pressing downward compressing the spring on the g900 Valve tool. While holding the tool down with the spring compressed, turn the tools handle clockwise until it stops. next, release the springs compression by lifting the handle slightly on the g900 Valve tool. this action hooks and locks the inlet valve to the tool. Finally, pull upward on the tools handle to remove the tool and inlet valve from the rotors body (fig 96).

Important take note of how the g900 Valve tool nests with the attached inlet valve. this will help later when attaching the inlet valve to the tool prior to inlet valve installation.

FIg 94 FIg 95

FIg 97 Inlet ValVe asseMbly reMoVed FroM tool

FIg 96

Fig 94

Fig 95 Fig 96

Fig 96

Fig 94

Fig 95 Fig 96

Fig 94

Fig 95 Fig 96

to disengage the inlet valve from the g900 Valve tool, hold the inlet valve with one hand and the tool with the other hand. next, push the tools handle toward the inlet valve to compress the tools spring. With the spring held compressed, rotate the tools handle counter-clockwise to release the tools hooks from the inlet valve (fig 97).

31

inleT VAlVe SeRViCing All ModelS

Inlet Valves (also commonly known as foot valves) do not have serviceable internal parts and the valves are welded together as an assembly. as a result, inlet valves cannot be taken apart. any disassembly of an inlet valve will lead to a valve that is no longer usable.

contamination within the inlet valve can cause the valve to leak. to remove contamination within the inlet valve, follow the procedures below:

Fill a bucket with clean water. using the tts Valve Flushing tool, insert the stainless steel metal pins on the tool into the holes at the bottom of the inlet valves screen (fig 98). While holding the tts Valve Flushing tool in the palm of one hand and the top of the inlet valve with the other hand, lower the inlet valve into the bucket of water. to clean &flushcontaminationfromthevalve,firmlypushthetoolintothevalve(fig99).Resistancewillbefeltasthevalvesinternal spring is compressed. cycle the valve open & closed with the tool multiple times while holding it submerged in the bucket of water. remove the valve from the water and inspect for any remaining contamination.

FIg 98 FIg 99

Fig 97 Fig 98

Fig 97 Fig 98

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inleT VAlVe inSTAllATion SAfeTy WARningS

Caution! If inlet valve (also commonly known as a foot valve) is not properly installed and held securely in place with a properly installed snap-ring, the inlet valve can be expelled from the rotor when the piping is re-pressurized. Serious bodily injury can occur. Keep head and body parts away from the rotor when piping is being re-pressurized.

Attention! Read and understand the inlet valve installation instructions outline below. If you are unsure or not clear on any portion of the installation procedure, contact your local Hunter Golf Distributor Representative or Hunter Technical Services can be contacted at 800-733-2823 and choose option #3.

inleT VAlVe inSTAllATion g800 SeRieS

remove excess water from the rotors body cavity. Inspect the upper and lower snap ring grooves making sure there are no damaged or missing sections of plastic adjacent to (next to) the snap ring grooves. remove all plastic shavings or burrs of plastic that are found within the body cavity.

Ifneeded,asmallamountofDowCorning#111ValveLubricantorpurepetroleumjellylikeVaselinecanbeused around the o-ring on the inlet valve. In most instances, residual water within the rotors body cavity is sufficient lubrication for inlet valve installation.

Caution! use of other non-specified lubricants can attack and deteriorate the plastic used in golf rotors. stress cracks or leaking caused by the use of improper lubricants are not covered under warranty.

Inlet valve installation option 1 g800 series inlet valves are installed in the body using the g800 Valve tool. prior to using the tool, familiarize yourself with the individual features of the g800 Valve tool. First, notice there are two metal hooks at the bottom of the tool (fig 100). these hooks are used to grab/hook the inlet valve during installation. the black plastic part of the g800 Valve tool includes physical features that hold or nest the inlet valve and the white lower snap ring to the tool during installation.

In order to engage the inlet valve and white lower snap ring with the g800 Valve tool properly, you must be familiar with the pointing and alignment features on the tools black plastic part. First, look at the three retaining screws on top of the tool. next, find the screw that has a pointer arrow engraved around the head of the screw (fig 101). this pointer is used to indicate the direction and alignment that the tool must have as it is inserted into the rotors body. a second pointer arrow is located directly below on the underside of the g800 Valve tool (fig 102).

the underside of the black plastic part on the g800 Valve tool includes a feature that will hold the white lower snap ring in position during installation. the white lower snap ring must be oriented correctly in the tool and the raised areas at each end of the snap ring must be facing the black plastic part on the tool. the white lower snap ring must be loaded to the g800 Valve tool correctly. If the snap ring is not loaded correctly, the valve cannot be loaded to the tool.

FIg 100 FIg 101 FIg 102

Fig 99

Fig 100 Fig 101

Fig 99

Fig 100 Fig 101

Fig 99

Fig 100 Fig 101

33

to install the inlet valve into the rotors body, first load the white lower snap ring to the tool. Hold the white lower snap ring in the palm of one hand with the raised protruding ends of the snap ring facing towards you (fig 103). In the other hand hold the g800 Valve tool with the metal hook end of the tool pointing towards you. compress the snap ring and place onto the tool so that the two metal roll-pins at the bottom of the black plastic part of the tool hold and retain the white lower snap ring (fig 104).

With the white lower snap ring loaded to the underside of the g800 Valve tool, load the inlet valve to the tool. to do so, hold the inlet valve in one hand with its top facing toward you (fig 105). rotate the inlet valve in your hand so that the communication port (located on the side of the inlet valve) is at the 12:00 position while holding it in your hand. In the other hand, hold the g800 Valve tool by the handle. the tool needs to be held so that the pointer arrow (located at of one of the three screws on top of the tool) is also oriented to the 12:00 position.

next, slightly rotate the tool counter-clockwise to the 11:30 position. this alignment will allow the two metal hooks on the g800 Valve tool to pass through the two correct openings around the outside of the inlet valve. press the metal hooks through the openings. continue pressing the inlet valve and g800 Valve tool together compressing the spring on the tool (fig 106). While holding the tool down with the spring compressed, turn the tools handle clockwise until it stops. next, release the springs compression by lifting the handle slightly on the g800 Valve tool. this action hooks and locks the inlet valve to the tool. check to make sure that the pointer arrow on the tool is directly above the communication port on the inlet valve and that the valve is securely hooked to the tool.

FIg 103

FIg 105

FIg 104

FIg 106

Fig 102 Fig 103

Fig 104

Fig 105

Fig 104

Fig 105

Fig 102 Fig 103

34

next, insert the assembled tool, white lower snap ring and inlet valve into the rotors body cavity. to do so, it is necessarytoalignthepointerarrowontheG800ValveToolwiththealignmentdotontherotorsflange.Thealignmentdotiscenteredontheflangecompartmentlidadjacentto(nextto)thebodycavityopening(fig107).Asecondalignmentdotislocatedbelowthelidincasetheflangecompartmentlidhasbeenremoved.Alignthepointer arrow on the tool with the alignment dot and lower the assembled tool, white lower snap ring and inlet valve into the rotors body.

as the g800 Valve tool is lowered into the rotors body, recessed areas on the black plastic part on the tool will engage vertical rails inside the body wall (fig 108). the tool must engage these rails or the inlet valves communication port will not align with the communication port in the body cavity below. continue pressing the assembled tool, white lower snap ring and inlet valve downward into the rotors body. once the tool reaches the bottom, continue pressing firming to securely seat the inlet valve and snap ring.

a distinct click sound should be heard as the snap ring is released and engages the snap ring groove in the rotors body cavity. after the inlet and white lower snap ring have been properly seated, press down on the tool then rotate counter-clockwise to disengage the tools metal hooks from the inlet valve. next, raise the g800 Valve tool out of the body. Finally, take whatever time is necessary to visually confirm that every part of the white lower snap ring is securely seated into the snap ring groove.

FIg 107 FIg 108

Fig 106 Fig 107

Fig 106 Fig 107

35

Inlet valve installation option 2 the alternative method to installing the g800 inlet valve is to use the 16 needle-nose pliers tool. First look at the top of the inlet valve and notice the raised wall or rib that protrudes upward from the center. during installation, the 16 needle-nose pliers tool is used to grab this protruding rib on the inlet valve. next, look at the side of the inlet valve and notice the communication port. during installation, this communication port must engage the communication port at the bottom of the rotors body cavity. now notice that directly above the communication port there is a slot feature on the valves outside ring (fig 109). during installation, this slot feature must engage the vertical rail of plastic located on the rotor bodys inside wall. the vertical rail is located directly above the communication port at the base of the rotors body cavity.

grab the protruding rib on the inlet valve firmly with the 16 needle-nose pliers tool. next, insert the inlet valve into the rotors body cavity. It is necessary to align the valves communication port and/or the slot feature with the alignmentdotontherotorsflange(fig110).Thealignmentdotiscenteredontheflangecompartmentlidadjacentto(nextto)thebodycavityopening.Asecondalignmentdotislocatedbelowthelidincasetheflangecompartmentlid has been removed.

FIg 109 FIg 110

Fig 108

Fig 109

Fig 108

Fig 109

36

With the valves communication port and/or the slot feature aligned to the dot on top of the rotor, carefully lower the inlet valve into the rotors body. If the inlet valve is properly engaged with the vertical rail in the body, it will not be possible to rotate the inlet valve. If the inlet valve can be rotated in either direction, pull the inlet out and start again. With the inlet valve engaging the bodys vertical rail, continue lowering the valve into the rotors body. It is important to keep the inlet valve vertical in order to allow the valves rock screen to enter the inlet of the body. once the inlet valve reaches the bottom, continue pressing firming to securely seat the inlet valve.

next, use the 16 needle-nose pliers tool to install the white lower snap ring. to do so, use the tool to grab the outer side of the two raised areas near the ends of the white lower snap-ring (fig 111). the snap ring must be installed with these two raised & protruding areas on the

Hunter G Series Manual - Installation & Maintenance Manual for Hunter G800 and G900 Series Sprinklers (G870, G875, G880, G885, G990 & G995)

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